Michigan City Police said the robber entered the gas station shortly after 1 a.m. Nov. 20, pulled a knife and demanded money from the clerk. He then fled.

On Nov. 21 at about 3 a.m., the suspect drew a knife and demanded money from the Baymont Inn night clerk, then fled.

Subsequent investigations led police to Knoll as the suspect. He was also wanted on several outstanding warrants in LaPorte County for other crimes. Knoll was arrested Nov. 22 on the outstanding warrants, then charged Dec. 1 with the robberies.

Anyone with further information about these crimes or others in Michigan City are asked to call the Crime Tip Hotline at 219-873-1488.